Most capes shown in this thread or my pictures ( profile) are for Fall/ Winter 2012.
If you should like for instance a Dolce & Gabanna cape you will have to wait until summer is over.
Then the Fall/ Winter collection will be available.

After summer they will be probably sold in specialised shops ( "google" for this to search a specialised shop in your environment)

My environment is currently Inner Mongolia, Northern China. I actually had a look on Taobao, there are women's capes but no men's ones. Thing is I could probably wear a cape here though and think nothing of it, most people around here would just think that's what Englishmen wear.

I personally wouldn't wear one because I think they look ridiculous. It's on par with the Victorian-era crowd, Fedora Lounge dressers, etc. You simply look out of place, and like you're on your way to a carnival, theme party or something.